Thread cleaning tool with ejector pin for valve housings



Sept. 21, 1954 STAFFORD 2,689,356

THREAD CLEANING TOOL WITH EJECTOR PIN FOR VALVE HOUSINGS Filed July 14,1952 ass 5 m W m a ,za 5 52M v .INVENTOR 1" Z/zur fz n i a fa r ZATTORNEYS Patented Sept. 21, 1954 UNITED STATES PATENT OFFICE THREADCLEANING TOOL WITH EJECTOR PIN FOR VALVE HOUSINGS Arthur HerbertStafford, Miami, Fla. Application July 14,1952, Serial No. 298,743

1 Claim. 1

This invention relates to a tool for removing a broken needle valve.

In carburetors and other valve structures, needle valves are provided,and such needle valves include a small diameter pin engageable through avalve opening. In carburetors a valve of this type is used for the idlervalve, and it frequently happens that the pin breaks off from the shankand sticks in the opening. Removal of the broken pin is ordinarily quitea problem as the pin must be removed without damaging the valve seat orthe opening in which the pin is disposed. It is, therefore, an object ofthis invention to provide a tool by means of which the broken pin can beeasily and quickly removed without damage to the adjoining parts.

Another object of this invention is to provide a tool which will cleanout the threads for the valve stem or shank so that a new needle valvecan be easily inserted in the valve socket or housing.

With the above and other objects in view, my invention consists in thearrangement, combination and details of construction disclosed in thedrawings and specification, and then more particularly pointed out inthe appended claim.

In the drawing:

Figure 1 is a detailed side elevation of a needle valve removerconstructed according to an embodiment of this invention.

Figure 2 is an enlarged side elevation partly broken away and in sectionshowing the tool in operative position in a needle valve housing.

Figure 3 is a sectional view of a needle valve housing showing a brokenpin or needle disposed in the housing.

Figure 4 is a sectional view .taken on the line 4-4 of Figure 1.

Referring to the drawing, the numeral I designates generally a needlevalve housing, such as the housing used in carburetors and moreparticularly for an idler needle valve. The valve housing III isinteriorly threaded, as at II, and a valve seat member I2 is disposed inthe inner end of the housing III. The seat member I2 is formed with acylindrical bore I3 within which the valve plug or pin I4 of a needlevalve is adapted to engage. Normally the pin I4 has relatively closeengagement with the wall of the opening I3 and during the use of thecarburetor, corrosion frequently makes the pin I4 bind in the opening I3so that adjustment of the idler valve causes the pin I4 to break off ofthe shank or stem of the needle valve.

In order to provide a means whereby the broken pin It may be removedwithout damage to the valve seat member I2, I have provided a pinremoving tool generally designated as I5. The tool I5 is constructed inthe form of an elongated bar I8, having a reduced diameter threadedshank I1 which is provided with longitudinally extending channels I8.The channels I8 form a tap with the threads of the shank I'I so that asthe latter is threaded into the housing Ill, the interior threads II ofthe housing II] will be cleaned of any corrosion which may be disposedtherein, such matter being dislodged by the threads II and extruded fromthe interior of the housing through the channels I8. 7

The shank I'l terminates in an unthreaded stud I! and a relatively smalldiameter ejector pin 20 extends axially from the stud I9. Preferably theejector pin 20 is of a diameter slightly less than the diameter of theopening I3 so that pin 26 may readily pass through the opening l3 in theforcible pushing or ejection of the broken valve pin I4. The tool I5 ispreferably formed of tool steel, and the outer portion of the bar It hasa cross bar or handle 2I secured thereto.

In the use and operation of this tool, when the needle valve pin I I isbroken oil from the shank or stem of the valve and is stuck in the valveseat I2, the pin I4 may be removed by threading the shank I'I into thebore I3 of the needle valve housing I0. Ejector pin 20 will contact withthe broken valve pin I4, and the latter will be forcibly pushed out ofthe valve seat or body I2 without damage to the seat or to any portionof the housing III. The inward threading of the shank I! will by reasonof the tap formation of the shank serve to clean out the threads II sothat when a new needle valve is inserted, such new valve will freelythread into the housing I0.

I do not mean to confine myself to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claim.

What is claimed is:

In a broken needle valve removing tool of the type comprising anelongated bar, threads at one end of said bar, a handle at the other endof said bar, and an ejector pin extending axially from said one end,means for cleaning corrosion dislodged from the valve housing by saidthreads, said means comprising lengthwise grooves in said barintersecting whereby said threads corrosion from the valve housing isextruded through said groove.

.References Cited in the file of this patent UNITED STATES PATENTSNumber Name Date 1,128,563 Whitney n.. Feb. 16, 1915 2,054,267 ReillySept. 15, 1936 2,350,675 Feldman June 6, 1944 2,417,360 Heintzelman Mar.11, 1947 2,564,196 Denzler Aug. 14, 1951

